/**
 * Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
 *
 * You are hereby granted a non-exclusive, worldwide, royalty-free license to use,
 * copy, modify, and distribute this software in source code or binary form for use
 * in connection with the web services and APIs provided by Facebook.
 *
 * As with any software that integrates with the Facebook platform, your use of
 * this software is subject to the Facebook Developer Principles and Policies
 * [http://developers.facebook.com/policy/]. This copyright notice shall be
 * included in all copies or substantial portions of the software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package com.facebook.appevents.internal;

import android.os.AsyncTask;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.net.URL;
import java.net.URLConnection;

public class FileDownloadTask extends AsyncTask<String, Void, Boolean> {

    private Callback onSuccess;
    private File destFile;
    private String uriStr;

    public FileDownloadTask(String uriStr, File destFile, Callback onSuccess) {
        this.uriStr = uriStr;
        this.destFile = destFile;
        this.onSuccess = onSuccess;
    }

    @Override
    protected Boolean doInBackground(String... args) {
        try {
            URL url = new URL(uriStr);
            URLConnection conn = url.openConnection();
            int contentLength = conn.getContentLength();

            DataInputStream stream = new DataInputStream(url.openStream());

            byte[] buffer = new byte[contentLength];
            stream.readFully(buffer);
            stream.close();

            DataOutputStream fos = new DataOutputStream(new FileOutputStream(destFile));
            fos.write(buffer);
            fos.flush();
            fos.close();
            return true;
        } catch (Exception e) { /* no op */ }
        return false;
    }

    @Override
    protected void onPostExecute(Boolean isSuccess) {
        if (isSuccess) {
            onSuccess.onComplete(destFile);
        }
    }

    public interface Callback {

        void onComplete(File file);
    }
}
